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by JetSpiegel 2678 days ago
> pointing multi-megawatt beam of energy at any point on the ground, with little to no countermeasures available.

Can't you use a mirror to reflect a significant part of that energy back, wrecking the transmitter? If it is several mirrors focusing on the same point on earth (like a solar thermal power station), just jiggle the mirror on land to sweep the mirrors with a beam of energy.